[Retracted] An Empirical Analysis of Piano Performance Skill Evaluation Based on Big Data

Table 4

Error between the result matrix of the third test and the actual situation.

	Good	Commonly	Qualified	Unqualified	Difference
Good	−0.021	1.33	−0.31	−1.32	0.78
Commonly	1.21	0.08	−0.18	1.84	0.82
Qualified	−0.001	−0.312	0.08	−0.721	−0.312
Unqualified	1.21	0.82	0.82	0.026	0.82
Difference	0.60	−0.19	−0.42	0.31	0.027